<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <!-- 准备好一个“容器” -->
  <div id="test"></div>

  <!-- 引入react核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>

  <script type="text/babel">
    class Demo extends React.Component {
      showData = () => {
        // console.log(this.refs.inp1);
        const {inp1} = this.refs;
        alert(inp1.value)
      }
      showBlur = () => {
        const {inp2} = this.refs;
        alert(inp2.value)
      }
      render() {
        return (
          <div>
            <input ref="inp1" type="text" placeholder="点击按钮提示数据"/>
            <button onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
            <input ref="inp2" onBlur={this.showBlur} type="text" placeholder="失去焦点提示数据"/>
          </div>
        )
      }
    }
    ReactDOM.render(<Demo/>, document.getElementById('test'))
  </script>
</body>
</html>